Chef Rebecca Katz routinely lectures and leads culinary workshops at top medical institutions including Johns Hopkins. Top on her agenda is always a list of nutrient-dense, cancer-fighting foods like berries, avocados, and almonds. But Katz’s real magic is a cooking system she calls FASS. (The acronym stands for fat, acid, salt, and sweet.) Making sure there’s some level of FASS in a dish helps any cook punch up the flavor to entice those with a lackluster appetite. Look for details in her book, The Cancer-Fighting Kitchen (Celestial Arts, 2009) or on her website.